This is my first project bike ever and I have a few questions that I hope someone can help me out with. I cant figure how to remove the two back wheels from the axle. It looks like there is an allen key inside the wheel on the hub, I removed it but that didnt help. It looks like there might be a pin holding the wheel onto the axle but I tried knocking it out and it wont budge. My second issue or question is, I would like to put 26" 144 spokes on the Trike, do I need a hollow hub rim and if so how does it attach to the axle? Like a normal hex nut onto the axle? Thanks for the help, heres a few before pics of the Trike, it wont look anything like this shortly.